WO2017145773A1 - Ruban adhésif sensible à la pression, feuille de rayonnement thermique et instrument électronique - Google Patents

Ruban adhésif sensible à la pression, feuille de rayonnement thermique et instrument électronique Download PDF

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Publication number
WO2017145773A1
WO2017145773A1 PCT/JP2017/004698 JP2017004698W WO2017145773A1 WO 2017145773 A1 WO2017145773 A1 WO 2017145773A1 JP 2017004698 W JP2017004698 W JP 2017004698W WO 2017145773 A1 WO2017145773 A1 WO 2017145773A1
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WO
WIPO (PCT)
Prior art keywords
pressure
sensitive adhesive
adhesive tape
adhesive
thickness
Prior art date
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PCT/JP2017/004698
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English (en)
Japanese (ja)
Inventor
克明 今井
晃 山上
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Dic株式会社
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Publication date
Application filed by Dic株式会社 filed Critical Dic株式会社
Priority to KR1020187022740A priority Critical patent/KR102044769B1/ko
Priority to CN201780011057.3A priority patent/CN108699406B/zh
Priority to JP2018501560A priority patent/JP6566115B2/ja
Publication of WO2017145773A1 publication Critical patent/WO2017145773A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
    • H05K7/20445—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff
    • H05K7/20472—Sheet interfaces
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/204—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive coating being discontinuous
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature

Definitions

  • the present invention relates to a thin adhesive tape that can be used, for example, in the production scene of electronic devices and the like.
  • the adhesive tape Since the adhesive tape has good workability and adhesion reliability, it is widely used in the production scenes of electronic equipment such as OA equipment and home appliances.
  • the electronic devices have been required to have high functionality, downsizing, and thinning, and in particular, portable electronic devices such as personal computers, digital video cameras, electronic notebooks, mobile phones, PHSs, smartphones, game devices, electronic books, and the like. Terminals are required to be further reduced in size and thickness. Accordingly, the adhesive tape and the like constituting the portable electronic terminal are also required to be thin.
  • an acrylic acid ester copolymer having a weight average molecular weight of 700,000 or more and a butyl acrylate unit content of 90% by mass or more, and a tackifier are the main components
  • a double-sided pressure-sensitive adhesive tape having a thickness of 2 to 10 ⁇ m on each side is known (see, for example, Patent Document 1).
  • the thinning of the heat radiating member is being studied along with the thinning of the electronic device, etc., and using a pressure-sensitive adhesive tape simply provided with a bubble escape path, the thin graphite sheet or the like and the heating member
  • the surface irregularity shape of the tape derived from the escape route of the bubbles may be raised on the surface of the graphite sheet or the like, which may cause a decrease in the appearance of the adhered material. This decrease in appearance sometimes occurred more remarkably as the graphite sheet or the like was made thinner.
  • the problem to be solved by the present invention is that bubbles can quickly escape from the interface with the adherend, prevent bubbles from remaining at the interface, have excellent adhesion, and the adherend is thin. It is an object to provide a thin adhesive tape that does not cause deterioration in appearance.
  • the inventors of the present invention provide an adhesive tape having a total thickness of 20 ⁇ m or less having two or more adhesive portions on at least one surface side of a support, and the thickness of the adhesive portion is in the range of 1 ⁇ m to 15 ⁇ m.
  • the area per adhesive part is 0.02 mm 2 to 0.5 mm 2 , and the distance between any one adhesive part and the adhesive part at the shortest distance is 0.03 mm to 0.2 mm.
  • the said subject was solved with the adhesive tape characterized by being a range.
  • the pressure-sensitive adhesive tape of the present invention is very thin, bubbles are quickly removed from the interface with the adherend, and bubbles do not easily remain at the interface, and the appearance is not deteriorated even if the adherend is thin, And since it is excellent in adhesive force, it can be used suitably for adhesion
  • the pressure-sensitive adhesive tape of the present invention is a pressure-sensitive adhesive tape having a total thickness of 20 ⁇ m or less having two or more pressure-sensitive adhesive portions on at least one surface side of the support, and the thickness of the pressure-sensitive adhesive portion is in the range of 1 ⁇ m to 15 ⁇ m.
  • the area per adhesive part is 0.02 mm 2 to 0.5 mm 2
  • the distance between any one adhesive part and the adhesive part in the shortest distance is 0.03 mm to 0.2 mm It is the range of these.
  • the adhesive tape can be suitably used exclusively for bonding a heat generating member and a heat radiating member, or for bonding a metal member in contact with the heat generating member and a heat radiating member.
  • the pressure-sensitive adhesive tape of the present invention having two or more independent pressure-sensitive adhesive portions directly on at least one surface side of the support, or at least one of the support A pressure-sensitive adhesive tape having two or more independent pressure-sensitive adhesive portions through an arbitrary layer on the surface side is mentioned.
  • a pressure-sensitive adhesive tape having two or more independent pressure-sensitive adhesive portions on both surface sides of the support, and one surface side of the support
  • the pressure-sensitive adhesive tape has two or more independent pressure-sensitive adhesive portions and has a pressure-sensitive adhesive layer on the entire surface or part of the other surface.
  • the adhesive tape there is no adhesive component between any one adhesive part of the two or more adhesive parts and the other adhesive part located at the shortest distance, or the adhesive tape has adhesiveness. It is possible to use the one that does not exist, and the use of the one that does not contain the adhesive component can quickly prevent bubbles from leaving the interface with the adherend and leaving bubbles at the interface. It is preferable when obtaining an adhesive tape. Therefore, when the adhesive tape of the present invention is observed from the side surface direction, it is observed that the adhesive portion forms a convex shape with respect to the surface of the support.
  • play adhesiveness is the edge part ( It is preferable to have a configuration that leads to part of the outer edge).
  • the pressure-sensitive adhesive tape of the present invention is one having a thickness of 1 ⁇ m to 15 ⁇ m, preferably 2 ⁇ m to 5 ⁇ m.
  • an adhesive tape having an adhesive portion of the thickness air bubbles can be easily removed from the interface between the adherend and the adhesive portion, and as a result, appearance defects caused by swelling of the adhesive tape, etc.
  • the adherend such as a graphite sheet is further thinned, it is possible to more effectively prevent poor appearance due to the shape of the pressure-sensitive adhesive portion, and performance deterioration such as thermal conductivity, heat resistance, and adhesive strength. Can do.
  • the thickness of the adhesive part was measured in accordance with JIS K6783 under the condition that the dial gauge contact surface was flat, the diameter was 5 mm, and the load was 1.23 N according to JIS K6783. Refers to the thickness of
  • the adhesive portion per size (area) is used which is in the range of 0.02mm 2 ⁇ 0.5mm 2.
  • the pressure-sensitive adhesive tape having the above-mentioned pressure-sensitive adhesive part is easy to remove air bubbles from the interface with the adherend during application (air release property), can maintain a good adhesive force, and is an adherend such as a graphite sheet. Even when the thickness is further reduced, appearance defects due to the shape of the adhesive portion can be effectively prevented.
  • the size (area) per one adhesive part is more preferably 0.04 mm 2 to 0.3 mm 2 , further preferably 0.05 mm 2 to 0.2 mm 2 , and 0.06 mm 2.
  • the thickness is ⁇ 0.1 mm 2 , bubbles can be easily removed from the interface with the adherend during pasting (air release property), can maintain a good adhesive force, and more adherends such as graphite sheets can be used. Even when the thickness is further reduced, it is particularly preferable because an appearance defect due to the shape of the adhesive portion can be effectively prevented.
  • the above size (area) of the surface on the side having the adhesive portion of the adhesive tape (the region of the area 12 mm 2), was observed with an electron microscope ( ⁇ 100) from the vertical direction of the surface, optionally It is the value calculated
  • the adhesive tape is one in which the distance between one arbitrary adhesive portion of the adhesive portions and the other adhesive portion at the shortest distance is in the range of 0.03 mm to 0.2 mm. use. This makes it easier for air bubbles to escape from the interface with the adherend during pasting (air release properties), maintains good adhesion, and the adherend such as graphite sheet is made thinner. Even if it exists, the external appearance defect resulting from the shape of the adhesion part can be prevented effectively.
  • the distance between the arbitrary one adhesive part and the adhesive part at the shortest distance is preferably in the range of 0.04 mm to 0.15 mm, and in the range of 0.05 mm to 0.13 mm. This is because when bubbles are easily removed from the interface with the adherend during adhesion (air release properties), good adhesion can be maintained, and the adherend such as a graphite sheet is made thinner. Even if it exists, since the external appearance defect resulting from the shape of the adhesion part can be prevented effectively, it is especially preferable.
  • the said distance points out the shortest distance in the straight line between each tangent of each outer edge part of the said arbitrary one adhesion part and the other adhesion part located in the shortest distance.
  • the adhesive tape one having two or more adhesive portions can be used, but bubbles can be easily removed from the interface with the adherend when sticking (air release property), and good adhesive force can be maintained.
  • a predetermined area of the adhesive tape (1 cm in the flow direction) In the range of 1 cm in the width direction), preferably those having 120 to 2000 adhesive portions, more preferably those having 280 to 1600 adhesive portions, more preferably 520 It is more preferable to use one having ⁇ 1200 adhesive parts.
  • the number of the said adhesion part can be calculated
  • the shape of the adhesive portion is preferably substantially circular, substantially diamond-shaped, substantially hexagonal, etc.
  • bubbles can easily escape from the interface with the adherend (air release property), can maintain good adhesion, and the adherend such as graphite sheet is made thinner Even so, it is more preferable from the viewpoint of effectively preventing appearance defects due to the shape of the adhesive portion.
  • the substantially circular shape means that the pressure-sensitive adhesive portion is pressed when a release liner or the like is attached to the surface of the circular pressure-sensitive adhesive portion or when the pressure-sensitive adhesive tape is wound around a roll.
  • an elliptical shape or a partially distorted circular shape that can be formed by extending a part of the circular shape, or a part of the circular shape is threaded when the release liner is removed. It includes the shape that can be formed by. Examples of the elliptical shape include those having a major axis and a minor axis [major axis / minor axis] of 10 or less.
  • the substantially quadrangular shape examples include shapes such as a substantially square shape, a substantially rectangular shape, a substantially trapezoidal shape, and a substantially rhombus shape, and it is easy to remove bubbles from the interface with the adherend (air release property). In addition, it is preferable because a good adhesive force can be maintained.
  • the “substantially” such as the substantially square shape and the substantially hexagonal shape means that the adhesive portion is formed when a release liner or the like is attached to the surface of the adhesive portion, or when the adhesive tape is wound around a roll. By being pressed, it is shown that the corners of the square shape and the hexagonal shape are rounded and the shape where the straight line portion is a curved portion is included.
  • the corners of the substantially square shape are preferably substantially rhombus with the angle of the corners facing the flow direction of the adhesive tape being less than 90 °, and the range of 45 ° to 70 ° It is more preferable because air bubbles can be easily removed from the interface with the body (air release property) and a good adhesive force can be maintained.
  • the two or more adhesive portions do not face each other in the flow direction and the width direction of the adhesive tape. More specifically, as shown in FIG. 1 and the like, when the central portion of the adhesive portion is connected by a straight line, it is arranged at a position where a hexagonal shape can be formed to maintain a good adhesive force. In addition, it is preferable.
  • the adhesive tape is often used after being cut into an arbitrary shape depending on the application.
  • the two or more adhesive portions are arranged at positions not facing the flow direction and the width direction of the adhesive tape as described above, the adhesive tape is cut at an arbitrary position.
  • an adhesive part exists in a part of the end part, it becomes possible to suppress peeling of the end part of the adhesive tape.
  • the pressure-sensitive adhesive tape of the present invention it is preferable to use a tape whose ratio of the total area of the area where the pressure-sensitive adhesive portion occupies in the area of one surface of the support is 17% to 75%. It is more preferable to use those having a percentage of 70%, more preferably 40% to 65%, and particularly preferably those having a percentage of 50% to 60%.
  • a pressure-sensitive adhesive tape within the above range bubbles can be easily removed from the interface with the adherend (puff-off property) at the time of sticking, and can maintain a good adhesive force, and adherend such as a graphite sheet. Even when the thickness is further reduced, appearance defects due to the shape of the adhesive portion can be effectively prevented.
  • region is based on the area of the arbitrary area
  • the peak temperature of the loss tangent of the pressure-sensitive adhesive portion based on a dynamic viscoelastic spectrum measured at a frequency of 1 Hz is not particularly limited, but is ⁇ 30 ° C. to 20 ° C. It is preferable to use those having an adhesive part, more preferably those having an adhesive part of ⁇ 20 ° C. to 10 ° C., and those having an adhesive part of ⁇ 10 ° C. to 5 ° C.
  • bubbles can easily escape from the interface with the adherend during pasting (air release properties), can maintain good adhesion, and even when the adherend such as a graphite sheet is made thinner.
  • a viscoelasticity tester manufactured by Rheometrics, trade name: Ares 2KSTD
  • a test piece is sandwiched between parallel disks which are measurement units of the tester and stored at a frequency of 1 Hz.
  • An elastic modulus (G ′) and a loss elastic modulus (G ′′) are measured.
  • the peak temperature refers to the peak temperature confirmed in the spectrum of tan ⁇ with respect to the measurement temperature range ( ⁇ 50 ° C. to 150 ° C.).
  • an adhesive layer having a thickness of 0.5 mm to 2.5 mm formed using an adhesive used for forming the adhesive part is used.
  • test piece among the plurality of laminated adhesive tapes of the present invention, those having a total thickness of the adhesive layer of 0.5 mm to 2.5 mm can be used.
  • the value of the tan ⁇ changes.
  • the peak temperature does not substantially change. Therefore, any test piece may be used in the measurement of the peak temperature.
  • the pressure-sensitive adhesive tape of the present invention it is preferable to use a pressure-sensitive adhesive part having a gel fraction of 10% by mass to 60% by mass, and that having a gel fraction of 20% by mass to 55% by mass. It is more preferable to use a material having a gel fraction of 30% by mass to 50% by mass, so that even if it is thin, the surface shape of the adhesive part is easily maintained, so that changes over time can be prevented. Air bubbles can be easily removed from the interface between the adherend and the adhesive portion, resulting in poor appearance due to swelling of the adhesive tape, and thinner adherends such as graphite sheets.
  • the said gel fraction points out the value measured with the following method.
  • the release liner surface of the release liner is coated with an adhesive so that the thickness after drying is 50 ⁇ m, dried in an environment of 100 ° C. for 3 minutes, and then in an environment of 40 ° C. for 2 days.
  • An adhesive layer was formed by aging.
  • the test piece was prepared by cutting the pressure-sensitive adhesive layer into a square having a length of 50 mm and a width of 50 mm.
  • test piece After measuring the mass (G1) of the test piece, the test piece was immersed in toluene in a 23 ° C. environment for 24 hours.
  • the insoluble component in toluene was extracted by filtering the mixture of the test piece and toluene using a 300 mesh wire net.
  • the mass (G2) of the insoluble component dried at 110 ° C. for 1 hour was measured.
  • the gel fraction was calculated based on the mass (G1), mass (G2) and the following formula.
  • the pressure-sensitive adhesive part constituting the pressure-sensitive adhesive tape of the present invention includes, for example, an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a polyester-based pressure-sensitive adhesive, a styrene-diene block copolymer-based pressure-sensitive adhesive, and a vinyl alkyl.
  • an acrylic pressure-sensitive adhesive e.g., a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a polyester-based pressure-sensitive adhesive, a styrene-diene block copolymer-based pressure-sensitive adhesive, and a vinyl alkyl.
  • Examples thereof include those formed using known pressure-sensitive adhesives such as ether-based pressure-sensitive adhesives, polyamide-based pressure-sensitive adhesives, fluorine-based pressure-sensitive adhesives, creep property improving pressure-sensitive adhesives, and radiation curable pressure-
  • the pressure-sensitive adhesive portion or pressure-sensitive adhesive layer has the same composition or gel fraction, but has a different composition or gel content. You may use the adhesion part or adhesion layer which is rate.
  • acrylic pressure-sensitive adhesive one containing an acrylic polymer can be used.
  • acrylic polymer a polymer obtained by polymerizing a monomer component containing a (meth) acrylic monomer such as a (meth) acrylic acid alkyl ester can be used.
  • Examples of the (meth) acrylic acid alkyl ester include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, (meth ) Isobutyl acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate , 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, (meth
  • (meth) acrylic acid alkyl ester it is preferable to use a (meth) acrylic acid alkyl ester having 1 to 20 carbon atoms in the alkyl group, and the alkyl group having 4 to 18 carbon atoms. It is more preferable to use (meth) acrylic acid alkyl ester.
  • the alkyl group include linear or branched alkyl groups.
  • the use of butyl (meth) acrylate makes it easy to maintain the surface shape of the adhesive part, and therefore changes over time. It is preferable to obtain a pressure-sensitive adhesive tape that can easily prevent air bubbles from being easily removed from the interface with the adherend (air release property) and can maintain a good adhesive force.
  • a monomer having a carboxyl group such as (meth) acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, or the anhydride thereof
  • a monomer having a sulfonic acid group such as sodium vinyl sulfonate; a monomer having a cyano group such as acrylonitrile; an amide group such as acrylamide, methacrylamide, N-vinylpyrrolidone, N, N-dimethyl (meth) acrylamide
  • a monomer having a hydroxyl group such as hydroxyalkyl (meth) acrylate and glycerin dimethacrylate
  • a monomer having an amino group such as aminoethyl (meth) acrylate and (meth) acryloylmorpholine
  • Imides such as cyclohexylmaleimide and isopropylmaleimide
  • the monomer includes aromatic vinyl compounds such as styrene and substituted styrene; olefins such as ethylene, propylene, and butadiene; vinyl esters such as vinyl acetate; Vinyl chloride or the like can also be used.
  • aromatic vinyl compounds such as styrene and substituted styrene
  • olefins such as ethylene, propylene, and butadiene
  • vinyl esters such as vinyl acetate
  • Vinyl chloride or the like can also be used.
  • the acrylic polymer can be produced by polymerizing the monomer by a method such as a solution polymerization method, a bulk polymerization method, a suspension polymerization method, or an emulsion polymerization method, and a solution polymerization method may be employed. It is preferable for improving the production efficiency of the acrylic polymer.
  • Examples of the solution polymerization method include a method in which the monomer, a polymerization initiator, and an organic solvent are mixed and stirred at a temperature of preferably 40 ° C. to 90 ° C. for radical polymerization.
  • polymerization initiator examples include peroxides such as benzoyl peroxide and lauryl peroxide, azo thermal polymerization initiators such as azobisisobutylnitrile, acetophenone photopolymerization initiators, benzoin ether photopolymerization initiators, benzyl A ketal photopolymerization initiator, an acyl phosphine oxide photopolymerization initiator, a benzoin photopolymerization initiator, a benzophenone photopolymerization initiator, or the like can be used.
  • peroxides such as benzoyl peroxide and lauryl peroxide
  • azo thermal polymerization initiators such as azobisisobutylnitrile
  • acetophenone photopolymerization initiators benzoin ether photopolymerization initiators
  • benzoin ether photopolymerization initiators benzyl A ketal photopolymerization initiator
  • the acrylic polymer obtained by the above method may be in a state of being dissolved or dispersed in an organic solvent, for example, when produced by a solution polymerization method.
  • acrylic polymer obtained by the above method those having a weight average molecular weight of 300,000 to 1,200,000 are preferably used, and those having a weight average molecular weight of 400,000 to 1,100,000 are more preferably used. It is preferable to use one having a weight average molecular weight of 500,000 to 1,000,000 in order to obtain a pressure-sensitive adhesive tape having even better adhesive strength and ease of air bubble removal even if it is thin.
  • the weight average molecular weight is a value measured by gel permeation chromatography (GPC method) and calculated in terms of standard polystyrene. Specifically, the weight average molecular weight can be measured using a GPC apparatus (HLC-8329GPC) manufactured by Tosoh Corporation under the following conditions.
  • the pressure-sensitive adhesive that can be used to form the pressure-sensitive adhesive part, it is preferable to use a pressure-sensitive adhesive-containing resin in order to form a pressure-sensitive adhesive part having even better adhesive strength, tensile strength, and tensile breaking strength. .
  • the tackifying resin examples include a rosin tackifying resin, a polymerized rosin tackifying resin, a polymerized rosin ester tackifying resin, a rosin phenol tackifying resin, a stabilized rosin ester tackifying resin, and a disproportionated rosin ester. It is possible to use petroleum resin-based tackifiers such as styrene-based tackifier resins, hydrogenated rosin ester-based tackifier resins, terpene-based tackifier resins, terpene phenol-based tackifier resins, and styrene-based tackifier resins.
  • the tackifying resin a combination of a rosin-based tackifying resin and a petroleum resin-based tackifying resin is used, and the pressure-sensitive adhesive tape has an even better adhesive force and ease of removing bubbles. Is preferable in obtaining.
  • the rosin-based tackifying resin and petroleum resin-based tackifying resin are particularly preferably used in combination with the acrylic polymer, and an acrylic polymer obtained by polymerizing a monomer containing butyl (meth) acrylate; Use in combination is preferable in order to obtain a pressure-sensitive adhesive tape having even better adhesive strength and ease of air bubble removal even if it is thin.
  • the tackifying resin it is preferable to use a tackifying resin that is liquid at room temperature in order to further improve the initial adhesive force of the pressure-sensitive adhesive portion.
  • the tackifying resin that is liquid at room temperature include low-molecular-weight liquid rubbers such as process oil, polyester plasticizer, and polybutene, and terpene phenol resins can be used.
  • the tackifying resin is preferably used in the range of 20 to 60 parts by mass, more preferably in the range of 30 to 55 parts by mass with respect to 100 parts by mass of the acrylic polymer. It is more preferable for obtaining a pressure-sensitive adhesive tape having a high adhesive strength.
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive part a material containing a softener, a plasticizer, a filler, an anti-aging agent, a colorant, etc. is used as necessary in addition to the acrylic polymer. be able to.
  • the use of a cross-linking agent can adjust the gel fraction of the adhesive part to a suitable range, and as a result, the shape of the adhesive part is easily maintained, thereby preventing changes over time. It is preferable because air bubbles can be easily removed from the interface between the adherend and the pressure-sensitive adhesive portion, and a pressure-sensitive adhesive tape having excellent adhesive force can be obtained.
  • crosslinking agent for example, an isocyanate crosslinking agent or an epoxy crosslinking agent is preferably used.
  • isocyanate crosslinking agent examples include tolylene diisocyanate, naphthylene-1,5-diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, trimethylolpropane modified tolylene diisocyanate, and the like. It is preferable to use a toluene diisocyanate adduct such as trimethylolpropane-modified tolylene diisocyanate.
  • the toluene diisocyanate adduct has a structure derived from toluene diisocyanate in the molecule, and examples of commercially available products include Coronate L (manufactured by Nippon Polyurethane Industry Co., Ltd.).
  • the isocyanate crosslinking agent it is preferable to use an acrylic polymer having a hydroxyl group as the acrylic polymer.
  • the acrylic polymer having a hydroxyl group is a monomer used for the production thereof, such as 2-hydroxyethyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, etc. It is more preferable to use 2-hydroxyethyl (meth) acrylate and 4-hydroxybutyl (meth) acrylate.
  • epoxy crosslinking agent for example, Tetrad X or Tetrad C manufactured by Mitsubishi Gas Chemical Co., Ltd., or E-05X manufactured by Soken Chemical Co., Ltd. can be used.
  • an acrylic polymer having an acid group As the acrylic polymer, it is preferable to use an acrylic polymer having an acid group as the acrylic polymer.
  • the acrylic polymer having an acid group preferably uses, for example, (meth) acrylic acid, acrylic acid dimer, itaconic acid, crotonic acid, maleic acid, maleic anhydride, etc. It is more preferable to use (meth) acrylic acid.
  • the pressure-sensitive adhesive that can be used for forming the pressure-sensitive adhesive part, it is preferable to use a pressure-sensitive adhesive containing a solvent as necessary.
  • the pressure-sensitive adhesive preferably has a viscosity adjusted to a range of 0.1 mPa ⁇ s to 1000 mPa ⁇ s, and preferably has a viscosity adjusted to a range of 1 mPa ⁇ s to 200 mPa ⁇ s. It is more preferable to use a material adjusted to a range of 10 mPa ⁇ s to 100 mPa ⁇ s because it is easy to form an adhesive portion having a predetermined shape.
  • the support constituting the pressure-sensitive adhesive tape of the present invention preferably has a thickness of 1 ⁇ m to 10 ⁇ m, and preferably has a thickness of 1.5 ⁇ m to 6.0 ⁇ m. Can be thinned, and air bubbles can be easily removed from the interface between the surface having the adhesive portion and the adherend, and the appearance defect caused by the swelling of the adhesive tape or the adherence of a graphite sheet or the like Even when the body is further reduced in thickness, it is more preferable because it can more effectively prevent poor appearance due to the shape of the pressure-sensitive adhesive portion and performance deterioration such as thermal conductivity and adhesive strength.
  • a sheet-like material obtained using a resin can be used as the support.
  • polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate (PBT), polyamide (nylon), wholly aromatic polyamide (aramid), and the like.
  • Amide resins acrylic resins such as polybutyl acrylate, polyethyl acrylate and polymethyl methacrylate (PMMA), polystyrene, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin) Styrene resin such as polyether ether ketone (PEEK), polyether ketone such as polyether ketone ketone, polyether sulfone (PES), polysulfone, polyvinyl chloride (PVC), polyphenyl Nylene sulfide (PPS), polyimide (PI), polyamideimide, polyetherimide (PEI), polyesterimide, polycarbonate (PC), polyacetal, polyarylene ether (polyphenylene ether, etc.), polyphenylene sulfide, polyarylate, polyaryl, polyurethane, An epoxy resin etc. can be used individually or in combination of 2 or more types
  • the support it is preferable to use a polyester film, since a thickness variation is small, excellent in tensile strength and workability, and economical (cost), and a polyethylene terephthalate film is used. Is more preferable. It is preferable to use a biaxially stretched polyester film because the strength of the support and the pressure-sensitive adhesive tape obtained using the support can be further increased.
  • the support can be manufactured by molding the above resin into a sheet.
  • the said support body can be manufactured, for example with the following method.
  • a dry or undried polyester chip and, if necessary, a colorant or a masterbatch containing a colorant at a high concentration are melt-kneaded using a kneading extruder or the like.
  • the kneaded product is extruded from a die and rapidly cooled and solidified on a rotary cooling drum to obtain an unstretched polyester film that is substantially in an amorphous state.
  • the water content is preferably 50 ppm or less, more preferably When using a raw material such as polyester dried to be 30 ppm or less, or when using a twin screw extruder, a vent port is provided, preferably 40 hectopascals or less, more preferably 30 hectopascals or less, and even more preferably 20
  • the method include a method performed under a reduced pressure environment below hectopascal, and a method employing an electrostatic application adhesion method and a liquid application adhesion method, for example, in order to improve the adhesion between the polyester film and the rotary cooling drum.
  • the unstretched sheet is preferably stretched 2 to 6 times in the longitudinal direction at 70 ° C. to 145 ° C., longitudinally uniaxially stretched, and then laterally
  • the film is stretched 2 to 6 times at 90 ° C. to 160 ° C., and the process proceeds to the heat setting step.
  • the polyester film is preferably relaxed by 0.1% to 20% in the vertical direction and / or the horizontal direction in the maximum temperature zone for heat treatment and / or the cooling zone at the heat treatment outlet.
  • the stretched polyester film obtained by the above method may be relonged and restretched as necessary.
  • the support obtained by the above method may be composed of a single layer, or may be composed of multiple layers made of the same or different resins.
  • the support in order to further enhance the adhesion with the adhesive part and other adhesive layers, on one or both sides, for example, chromic acid treatment, ozone exposure treatment, flame exposure treatment, high pressure Those subjected to oxidation treatment such as electric shock exposure treatment and ionizing radiation treatment, and those formed with a primer layer by using a coating agent or the like can be used.
  • the pressure-sensitive adhesive tape of the present invention can be produced by, for example, applying the pressure-sensitive adhesive intermittently on one or both sides of the support and drying it to form a pressure-sensitive adhesive portion.
  • the pressure-sensitive adhesive is preferably applied intermittently to at least one surface of the support by a coating method such as a gravure coating method or a slot die coating method, and is applied by a direct gravure coating method. It is preferable.
  • the pressure-sensitive adhesive tape is produced by, for example, forming the pressure-sensitive adhesive portion by applying the pressure-sensitive adhesive on the surface of a release liner and drying, and then transferring the pressure-sensitive adhesive portion to at least one surface side of the support. be able to.
  • the pressure-sensitive adhesive tape of the present invention may be prepared, for example, using a release liner as described above, and then the release liner is peeled off as necessary and another release liner is affixed.
  • the adhesive tape of the present invention has a total thickness of 20 ⁇ m or less.
  • the total thickness of the adhesive tape is more preferably 2 ⁇ m to 15 ⁇ m, more preferably 3 ⁇ m to 10 ⁇ m, and more preferably 3 ⁇ m to 6 ⁇ m.
  • the total thickness of the adhesive tape was measured in accordance with JIS K6783 under the condition that the dial gauge contact surface was flat, the diameter was 5 mm, and the load was 1.23 N.
  • the adhesive tape refers to the thickness of the tape and does not include the thickness of the release liner.
  • the adhesive tape is a single-sided adhesive tape, it refers to the distance from the outer surface of the support to the outer surface of the adhesive part, and when it is a double-sided adhesive tape, one side of the support is The distance from the outer surface of the adhesive layer (or adhesive part) to comprise to the outer surface of an adhesive part is pointed out.
  • the thickness can be measured using, for example, a thickness meter TH-102 manufactured by Tester Sangyo.
  • a tape having an adhesive strength of 2N / 20 mm to 12 N / 20 mm is preferably used, and a tape having an adhesive strength of 4 N / 20 mm to 10 N / 20 mm is more preferably used. It is easy to remove bubbles from the interface between the adherend and the pressure-sensitive adhesive tape, even when it is thin, and it has excellent adhesive strength even if it has a thin adhesive strength of 5N / 20mm to 8N / 20mm. It is preferable for obtaining a pressure-sensitive adhesive tape.
  • the adhesive strength is a value measured according to JISZ0237. Specifically, the adhesive strength is such that the surface having the adhesive portion of the adhesive tape lined with a 25 ⁇ m thick polyethylene terephthalate film is overlapped with a clean and smooth stainless steel plate (BA plate), and the upper surface is 2 kg. After pressurizing by reciprocating once using a roller, it is left for 1 hour or 24 hours under the conditions of 23 ° C. and 50% RH, and then the adhesive tape is placed at 180 ° with respect to the affixing surface of the stainless steel plate. It is a value measured by peeling in the direction at a speed of 0.3 m / min.
  • the said lining was performed with respect to the surface of the adhesive layer which is not the adhesion part which is a structural requirement of this invention, when measuring the adhesive force of a double-sided adhesive tape. Moreover, when the said adhesive tape has the said adhesive part on both surfaces, the surface which has any one adhesive part was lined.
  • the pressure-sensitive adhesive tape of the present invention even if it is thin, it can prevent peeling over time due to the repulsive force of the adherend or the support, part falling off, etc., especially when used at a relatively high temperature.
  • the said adhesion retention strength points out the value measured according to JISZ0237.
  • the adhesion holding force is obtained by overlapping a surface having an adhesive portion of an adhesive tape lined with an aluminum foil having a thickness of 50 ⁇ m and a clean and smooth stainless steel plate (hairline), and a 2 kg roller on the upper surface.
  • a test piece is one that has been pressurized by reciprocating once and left for 1 hour at 23 ° C. and 50% RH.
  • the stainless steel plate constituting the test piece is fixed in a vertical direction in an environment of 100 ° C., and left for 24 hours with a load of 100 g applied to the lower end portion of the adhesive tape constituting the test piece. This is a value obtained by measuring the displacement distance between the stainless steel plate and the adhesive tape with a caliper.
  • the pressure-sensitive adhesive tape of the present invention has an excellent adhesive force even if it is very thin, it can be suitably used, for example, in the production scene of electronic devices such as portable electronic terminals that are required to be thin.
  • the clearance between adherends adheresive site of the adhesive tape
  • the adherends can be firmly bonded.
  • the pressure-sensitive adhesive tape easily removes air bubbles from the interface between the adherend and the adhesive part, the heat-dissipating member fixing application, the magnetic member fixing application, etc. where there is a concern about performance degradation due to the remaining of the air-bubbles. It can be preferably used.
  • a heat radiating member is affixed to the heat generating member or a member adjacent to the heat generating member (for example, a metal member which is a frame material used to give rigidity to the electronic device) for the purpose of diffusing the heat.
  • the heat radiating member for example, a graphite sheet, a graphene sheet, or a metal substrate is preferably used.
  • the graphite sheet includes two types, an artificial graphite sheet and a natural graphite sheet.
  • Examples of the artificial graphite sheet include a pyrolytic graphite sheet obtained by pyrolyzing an organic film such as a polyimide film in a high-temperature inert gas atmosphere.
  • Examples of the natural graphite sheet include those obtained by treating natural graphite with an acid and then pressurizing and expanding the graphite powder heated and expanded.
  • the graphite sheet it is preferable to use a sheet having less wrinkles from the standpoint of further improving heat dissipation, and it is more preferable to use an artificial graphite sheet having less wrinkles.
  • the graphite sheet preferably has a thickness of 100 ⁇ m or less, more preferably has a thickness of 10 ⁇ m to 50 ⁇ m, and preferably has a thickness of 15 ⁇ m to 20 ⁇ m. It is further preferable for contributing to thinning of electronic devices such as electronic terminals. Moreover, even if it is a case where it is the case where it is used for sticking of the said thin graphite sheet if it is the adhesive tape of this invention, the external appearance defect resulting from the shape of the adhesion part which the said adhesive tape has will be suppressed effectively. Can do.
  • the graphite sheet is relatively brittle, it is generally used in the form of a graphite composite sheet having an adhesive tape attached to one or both sides thereof.
  • the graphite composite sheet for example, as shown in FIG. 4, it is possible to use a graphite composite sheet having a structure sealed with a single-sided adhesive tape and a double-sided adhesive tape, to increase the strength and insulation of the graphite sheet. It is preferable to achieve both.
  • metal base material for example, aluminum, copper or the like can be used.
  • a member having a thickness of 100 ⁇ m or less is preferably used, a member having a thickness of 10 ⁇ m to 50 ⁇ m is more preferable, and a member having a thickness of 15 ⁇ m to 20 ⁇ m is preferably used. It is further preferable for contributing to thinning of electronic devices such as the above.
  • the pressure-sensitive adhesive tape of the present invention can be suitably used when a heat radiating sheet is produced by pouching a heat radiating member such as the graphite sheet.
  • a heat radiating member such as the graphite sheet.
  • the bonding of the graphite composite sheet and the member is performed, for example, by placing the graphite composite sheet on the surface of the member and temporarily bonding them by lightly pressing them, after the temporary bonding, using a roller or the like. It can be carried out through a step of pressing and firmly bonding them.
  • bubbles are usually present at the interface between the member and the graphite composite sheet.
  • it is a graphite composite sheet using the adhesive tape of this invention, when it pressurizes with the said roller etc., the said bubble will be removed from the said interface rapidly.
  • a surface protective film is often attached to the graphite composite sheet for the purpose of preventing scratches on the surface thereof.
  • the surface protective film is usually removed after attaching the graphite composite sheet and the member.
  • the pressure-sensitive adhesive tape of the present invention it is possible to firmly adhere to an adherend such as a member after the bubbles are removed. Therefore, when removing the surface protective film from the graphite composite sheet, the member of the graphite composite sheet Difficult to cause floating or peeling off.
  • the graphite composite sheet obtained using the pressure-sensitive adhesive tape of the present invention can prevent air bubbles from existing at the interface with the adherend such as a member. Therefore, the thermal resistance of the pressure-sensitive adhesive tape due to the presence of the air bubbles The increase in value can be effectively prevented, and as a result, the thermal conductivity in the thickness direction of the adhesive tape can be improved.
  • the pressure-sensitive adhesive solution and 2.0 parts by mass of “NC40” (manufactured by DIC Corporation, isocyanate crosslinking agent) were mixed and stirred to obtain pressure-sensitive adhesive a.
  • the peak temperature of tan ⁇ of the pressure-sensitive adhesive layer obtained using the pressure-sensitive adhesive a was 0 ° C., and the gel fraction thereof was 40% by mass.
  • the pressure-sensitive adhesive b was obtained by mixing and stirring the pressure-sensitive adhesive solution and 0.6 part by mass of “NC40” (manufactured by DIC Corporation, isocyanate crosslinking agent).
  • the peak temperature of tan ⁇ of the pressure-sensitive adhesive layer obtained using the pressure-sensitive adhesive b was 0 ° C., and the gel fraction thereof was 10% by mass.
  • the pressure-sensitive adhesive solution and “NC40” manufactured by DIC Corporation, isocyanate cross-linking agent 3.3 parts by mass were mixed and stirred to obtain pressure-sensitive adhesive c.
  • the peak temperature of tan ⁇ of the pressure-sensitive adhesive layer obtained using the pressure-sensitive adhesive c was 0 ° C., and the gel fraction thereof was 46% by mass.
  • the pressure-sensitive adhesive d was obtained by mixing and stirring the pressure-sensitive adhesive solution and 1.2 parts by weight of “NC40” (manufactured by DIC Corporation, isocyanate-based crosslinking agent).
  • the peak temperature of tan ⁇ of the pressure-sensitive adhesive layer obtained using the pressure-sensitive adhesive d was 0 ° C., and the gel fraction thereof was 20% by mass.
  • the pressure-sensitive adhesive e was obtained by mixing and stirring the pressure-sensitive adhesive solution and 1.3 parts by mass of “NC40” (manufactured by DIC Corporation, isocyanate crosslinking agent).
  • the peak temperature of tan ⁇ of the pressure-sensitive adhesive layer obtained using the pressure-sensitive adhesive e was ⁇ 15 ° C., and the gel fraction was 40% by mass.
  • Adhesive f 44.9 parts by mass of n-butyl acrylate, 50 parts by mass of 2-ethylhexyl acrylate, 3 parts by mass of vinyl acetate, 2 parts by mass of acrylic acid, and 0.1 part by mass of 4-hydroxybutyl acrylate were mixed with azobisiso
  • An acrylic polymer having a weight average molecular weight of 800,000 was obtained by performing solution polymerization at 70 ° C. for 10 hours in an ethyl acetate solution using 0.1 part by mass of butyronitrile as a polymerization initiator.
  • the pressure-sensitive adhesive f was obtained by mixing and stirring the pressure-sensitive adhesive solution and 1.3 parts by mass of “NC40” (manufactured by DIC Corporation, isocyanate crosslinking agent).
  • the peak temperature of tan ⁇ of the pressure-sensitive adhesive layer obtained using the pressure-sensitive adhesive f was ⁇ 25 ° C., and the gel fraction was 40% by mass.
  • Example 1 After applying the pressure-sensitive adhesive a to “PET25 ⁇ 1J0L” (manufactured by Nipper Co., Ltd., release liner having a silicone-type release treatment surface on the surface of a smooth PET film ) using a roll coater, 1 at 100 ° C. By drying for 1 minute, an adhesive layer having a thickness of 1 ⁇ m was produced.
  • the pressure-sensitive adhesive layer was transferred to one side of “K100-2.0W” (Mitsubishi Resin, polyester film, thickness 2 ⁇ m) as a support to obtain a single-sided tape.
  • K100-2.0W Mitsubishi Resin, polyester film, thickness 2 ⁇ m
  • the pressure-sensitive adhesive a is dot-printed on the other surface of the support constituting the single-sided tape using a gravure coater, and dried at 100 ° C. for 1 minute to obtain a substantially circular thickness of 3 ⁇ m.
  • a pressure-sensitive adhesive tape having a total thickness of 6 ⁇ m was obtained.
  • the distance of the arbitrary adhesion part and the adhesion part located in the shortest distance among the said adhesion parts was 0.1 mm.
  • PET25 ⁇ 1J0L (manufactured by Nipper Co., Ltd., release liner having a silicone-based release treatment surface on the surface of a smooth PET film) is laminated on the surface of the adhesive tape obtained above with a laminator. Affixed at 3 N / mm.
  • Example 2 to 11 A pressure-sensitive adhesive tape was prepared in the same manner as in Example 1 except that the shape and area of the pressure-sensitive adhesive part, the distance between the two pressure-sensitive adhesive parts, and the thickness of the pressure-sensitive adhesive part were changed to those shown in Tables 1 to 3. .
  • FIG. 1 is a conceptual diagram showing an adhesive part when the surface of the adhesive tape having the adhesive part is observed.
  • Example 13 An adhesive tape was obtained in the same manner as in Example 1 except that the adhesive c was used instead of the adhesive a.
  • Example 14 An adhesive tape was obtained in the same manner as in Example 1 except that the adhesive d was used instead of the adhesive a.
  • Example 15 An adhesive tape was obtained in the same manner as in Example 1 except that adhesive e was used instead of adhesive a.
  • Example 16 An adhesive tape was obtained in the same manner as in Example 1 except that the adhesive f was used in place of the adhesive a.
  • Example 17 to 21 A pressure-sensitive adhesive tape was produced in the same manner as in Example 1 except that the shape and area of the pressure-sensitive adhesive part, the distance between the two pressure-sensitive adhesive parts, and the thickness of the pressure-sensitive adhesive part were changed to those shown in Tables 4 and 5. .
  • the pressure-sensitive adhesive layer was transferred to one side of “K100-2.0W” (Mitsubishi Resin, polyester film, thickness 2 ⁇ m) as a support to obtain a single-sided tape.
  • K100-2.0W Mitsubishi Resin, polyester film, thickness 2 ⁇ m
  • the pressure-sensitive adhesive layer having a thickness of 3 ⁇ m is formed by drying at 100 ° C. for 1 minute. Produced.
  • PET25 ⁇ 1J0L manufactured by Nipper Co., Ltd., with a release liner having a silicone release treatment surface on the surface of a smooth surface PET film is laminated on the surface of the pressure-sensitive adhesive tape obtained above with a laminator. Affixed at / mm.
  • Comparative Example 2 A pressure-sensitive adhesive tape was obtained in the same manner as in Comparative Example 1 except that the thickness of the pressure-sensitive adhesive layer was changed to 2 ⁇ m.
  • the pressure-sensitive adhesive layer was transferred to one side of “K100-2.0W” (Mitsubishi Resin, polyester film, thickness 2 ⁇ m) as a support to obtain a single-sided tape.
  • K100-2.0W Mitsubishi Resin, polyester film, thickness 2 ⁇ m
  • the pressure-sensitive adhesive a is dot-printed on the other surface of the support constituting the single-sided tape using a gravure coater, and dried at 100 ° C. for 1 minute to obtain a substantially circular thickness of 3 ⁇ m.
  • a pressure-sensitive adhesive tape having a total thickness of 6 ⁇ m was obtained.
  • the distance of the arbitrary adhesion part and the adhesion part located in the shortest distance was 0.1 mm, and the area per adhesion part was 1 mm ⁇ 2 >.
  • PET25 ⁇ 1J0L (manufactured by Nipper Co., Ltd., release liner having a silicone-based release treatment surface on the surface of a smooth PET film) is laminated on the surface of the adhesive tape obtained above with a laminator. Affixed at 3 N / mm.
  • One arbitrary adhesive part was selected from the adhesive parts which comprise an adhesive tape, and it was set as the adhesive part (b1).
  • the adhesive part closest to the adhesive part (b1) was taken as the adhesive part (b2).
  • a tangent line was provided at each outer edge of the adhesive part (b1) and the adhesive part (b2), and the distance between each tangent line (the shortest distance in a straight line perpendicular to each tangent line) was measured.
  • the test piece After measuring the mass (G1) of the test piece, the test piece was immersed in toluene in a 23 ° C. environment for 24 hours. After the immersion, the mixture of the test piece and toluene was filtered using a 300 mesh wire net to extract insoluble components in toluene. The mass (G2) of the insoluble component dried at 110 ° C. for 1 hour was measured.
  • the gel fraction was calculated based on the mass (G1), mass (G2) and the following formula.
  • the pressure-sensitive adhesives a to f were each applied to the surface of the release liner so as to have a dry thickness of 50 ⁇ m and dried to form a pressure-sensitive adhesive layer, which was then cured at 40 ° C. for 2 days.
  • a test piece was prepared by laminating the adhesive layer after curing until the total thickness was 2 mm.
  • the test piece was sandwiched between parallel disk-shaped measuring parts having a diameter of 7.9 mm, a frequency of 1 Hz, and a heating time of 1 ° C./1.
  • the storage elastic modulus (G ′) and loss elastic modulus (G ′′) were measured from ⁇ 50 ° C. to 150 ° C. under the condition of min.
  • the loss tangent tan ⁇ was calculated from the following calculation formula.
  • the pressure-sensitive adhesive layer having a smooth surface was in contact with the graphite sheet.
  • the pressure-sensitive adhesive tapes obtained in Examples and Comparative Examples were cut into a width of 20 mm, and a test piece was prepared by backing one side of the pressure-sensitive adhesive layer with a polyethylene terephthalate film having a thickness of 25 ⁇ m.
  • the backing is performed on the surface of the pressure-sensitive adhesive layer having a smooth surface, and is not performed on the pressure-sensitive adhesive layer corresponding to the pressure-sensitive adhesive portion, which is a constituent of the present invention.
  • test piece was affixed to the surface of a clean and smooth stainless steel plate and pressurized by reciprocating a 2 kg roller on its upper surface under conditions of 23 ° C. and 50% RH according to JISZ-0237. After leaving for 1 hour, peel adhesion (peeling direction: 180 °, tensile speed: 0.3 m / min) was measured using a Tensilon tensile tester in an atmosphere of 23 ° C. and 50% RH. The measurement results are shown in the column of “Adhesive strength (1 hour after sticking)” in the table.
  • the pressure-sensitive adhesive tapes obtained in Examples and Comparative Examples were cut into a width of 20 mm, and a test piece was prepared by backing one side of the pressure-sensitive adhesive layer with a polyethylene terephthalate film having a thickness of 25 ⁇ m.
  • the backing is performed on the surface of the pressure-sensitive adhesive layer having a smooth surface, and is not performed on the pressure-sensitive adhesive layer corresponding to the pressure-sensitive adhesive portion, which is a constituent of the present invention.
  • test piece was affixed to the surface of a clean and smooth stainless steel plate, and was pressed by reciprocating once using a 2 kg roller on the upper surface, under conditions of 23 ° C. and 50% RH according to JISZ-0237. After being left for 24 hours, peel adhesion (peeling direction: 180 °, tensile speed: 0.3 m / min) was measured using a Tensilon tensile tester in an atmosphere of 23 ° C. and 50% RH. The measurement results are shown in the column of “Adhesive strength (24 hours after application)” in the table.
  • the pressure-sensitive adhesive tapes obtained in Examples and Comparative Examples were cut to a width of 20 mm, and a test piece was prepared by backing the pressure-sensitive adhesive layer on one side with an aluminum foil having a thickness of 50 ⁇ m.
  • the backing is performed on the surface of the pressure-sensitive adhesive layer having a smooth surface, and is not performed on the pressure-sensitive adhesive layer corresponding to the pressure-sensitive adhesive portion, which is a constituent of the present invention.
  • test piece was affixed to the surface of a clean and smooth stainless steel plate so as to have an affixing area of 20 mm ⁇ 20 mm, and pressurized by reciprocating once using a 2 kg roller on the upper surface thereof to JISZ-0237.
  • a load of 100 g was applied in the shear direction under an atmosphere of 100 ° C., and the deviation distance of the tape after 24 hours was measured.
  • the measurement results are shown in the “holding force” column of the table.
  • the shape of the adhesive portion (the above-mentioned substantially rhombus shape, substantially round shape, etc.) can be visually recognized. It was evaluated based on whether or not. The case where the shape of the adhesive part was not visible at all was evaluated as “ ⁇ ”, the part of the shape slightly visible as “ ⁇ ”, and the case where the shape was clearly visible was evaluated as “X”. did. In addition, as shown in Comparative Example 1, in the case where the pressure-sensitive adhesive was applied to the entire surface of the support and the pressure-sensitive adhesive layer was formed, the pressure-sensitive adhesive portion did not form a predetermined shape. Since it was not visually recognized, it was evaluated as “-” without evaluation.
  • the “substantially rhombus” in the table refers to a rhombus-shaped adhesive portion in which the angle of the corner portion facing the flow direction of the adhesive tape is 60 ° (the angle of the corner portion facing the width direction is 120 °) (see FIG. 2)
  • “Substantially square shape” refers to a square-shaped pressure-sensitive adhesive portion in which the angle of the corner portion facing the flow direction of the adhesive tape is 90 ° (the angle of the corner portion facing the width direction is 90 °).
  • the “substantially circular shape” refers to the adhesive portion having the shape shown in FIG. 1, and the “substantially hexagonal (hatched line)” refers to the adhesive portion having the shape shown in FIG.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

Le problème à la base de l'invention concerne un ruban adhésif mince sensible à la pression qui permet l'échappement rapide des bulles d'air depuis l'interface avec une partie adhérée de manière à supprimer le reste des bulles d'air au niveau de l'interface, qui présente une adhésivité élevée et qui ne provoque pas de détérioration d'aspect, même dans le cas où la partie adhérée présente une épaisseur mince. La solution porte sur un ruban adhésif sensible à la pression qui est pourvu de deux parties d'adhésif sensible à la pression ou plus, dans au moins une face superficielle d'un support et qui présente une épaisseur totale de 20 µm ou moins, caractérisé en ce que : l'épaisseur des parties adhésives sensibles à la pression se situe dans la plage de 1 à 15 μm ; la surface de chaque partie adhésive sensible à la pression est de 0,02 à 0,5 mm2 ; et la distance entre une partie arbitraire adhésive sensible à la pression et la partie adhésive sensible à la pression la plus proche se situe dans la plage de 0,03 à 0,2 mm.
PCT/JP2017/004698 2016-02-24 2017-02-09 Ruban adhésif sensible à la pression, feuille de rayonnement thermique et instrument électronique WO2017145773A1 (fr)

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3018714U (ja) * 1995-05-29 1995-11-28 株式会社コスモテック 微弱粘着フィルム
JPH09506564A (ja) * 1993-12-14 1997-06-30 ミネソタ マイニング アンド マニュファクチャリング カンパニー 両面感圧接着テープ及びその製造方法
JP2001110965A (ja) * 1999-10-07 2001-04-20 Fujikura Ltd 高熱伝導性粘着シート
JP2002319653A (ja) * 2001-04-20 2002-10-31 Matsushita Electric Ind Co Ltd グラファイトシートおよびそれを用いた放熱部品
JP2005272763A (ja) * 2004-03-26 2005-10-06 J-Film Corp 貼着用粘着シート
JP2007154144A (ja) * 2005-12-05 2007-06-21 Yoshihiro Suzuki 粘着加工シート及び粘着剤付剥離紙
JP2010174148A (ja) * 2009-01-29 2010-08-12 Kokuyo Co Ltd 粘着製品、転写具
JP2010254979A (ja) * 2009-03-31 2010-11-11 Dic Corp 放熱シート用粘着テープ及び放熱シート
JP2011042773A (ja) * 2009-08-24 2011-03-03 K D K Kk 穴あきフィルムシート
JP2011216671A (ja) * 2010-03-31 2011-10-27 Furukawa Electric Co Ltd:The 半導体ウエハの加工用テープ、その製造方法および半導体ウエハの加工方法
WO2016111208A1 (fr) * 2015-01-08 2016-07-14 株式会社寺岡製作所 Ruban adhésif
WO2016163537A1 (fr) * 2015-04-10 2016-10-13 株式会社カネカ Film composite en graphite et procédé pour sa production, et partie de dissipation de chaleur
WO2017022749A1 (fr) * 2015-08-06 2017-02-09 Dic株式会社 Bande adhésive, feuille de dissipation de chaleur, appareil électronique et procédé de fabrication de bande adhésive

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4761428B2 (ja) * 2004-07-20 2011-08-31 日東電工株式会社 粘着テープ類
KR100671404B1 (ko) * 2004-12-15 2007-01-19 주식회사 에이스 디지텍 대형 디스플레이 장치용 아크릴계 점착제 조성물 및 이를이용한 광학필름
JP4875357B2 (ja) 2005-12-19 2012-02-15 リンテック株式会社 両面粘着テープ
JP5647576B2 (ja) * 2010-08-05 2015-01-07 日東電工株式会社 接着テープ
JP5903984B2 (ja) * 2012-03-29 2016-04-13 Dic株式会社 着色粘着テープおよびグラファイト複合シート
JP5696739B2 (ja) * 2013-05-10 2015-04-08 コクヨ株式会社 感圧転写式粘着テープ及び転写具

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09506564A (ja) * 1993-12-14 1997-06-30 ミネソタ マイニング アンド マニュファクチャリング カンパニー 両面感圧接着テープ及びその製造方法
JP3018714U (ja) * 1995-05-29 1995-11-28 株式会社コスモテック 微弱粘着フィルム
JP2001110965A (ja) * 1999-10-07 2001-04-20 Fujikura Ltd 高熱伝導性粘着シート
JP2002319653A (ja) * 2001-04-20 2002-10-31 Matsushita Electric Ind Co Ltd グラファイトシートおよびそれを用いた放熱部品
JP2005272763A (ja) * 2004-03-26 2005-10-06 J-Film Corp 貼着用粘着シート
JP2007154144A (ja) * 2005-12-05 2007-06-21 Yoshihiro Suzuki 粘着加工シート及び粘着剤付剥離紙
JP2010174148A (ja) * 2009-01-29 2010-08-12 Kokuyo Co Ltd 粘着製品、転写具
JP2010254979A (ja) * 2009-03-31 2010-11-11 Dic Corp 放熱シート用粘着テープ及び放熱シート
JP2011042773A (ja) * 2009-08-24 2011-03-03 K D K Kk 穴あきフィルムシート
JP2011216671A (ja) * 2010-03-31 2011-10-27 Furukawa Electric Co Ltd:The 半導体ウエハの加工用テープ、その製造方法および半導体ウエハの加工方法
WO2016111208A1 (fr) * 2015-01-08 2016-07-14 株式会社寺岡製作所 Ruban adhésif
WO2016163537A1 (fr) * 2015-04-10 2016-10-13 株式会社カネカ Film composite en graphite et procédé pour sa production, et partie de dissipation de chaleur
WO2017022749A1 (fr) * 2015-08-06 2017-02-09 Dic株式会社 Bande adhésive, feuille de dissipation de chaleur, appareil électronique et procédé de fabrication de bande adhésive

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